{
  "@context": {
    "gsp": "http://www.opengis.net/ont/geosparql#",
    "sf": "http://www.opengis.net/ont/sf#",
    "schema": "https://schema.org/",
    "dc": "http://purl.org/dc/terms/",
    "Feature": "gsp:Feature",
    "FeatureCollection": "schema:Collection",
    "Point": "sf:Point",
    "name":"schema:name",
    "gsml":"http://geosciml.org",
    "wkt": "gsp:asWKT",
    "features": {
      "@container": "@set",
      "@id": "schema:hasPart"
    },
    "geometry": "sf:geometry",
    "description": "dc:description",
    "value":"schema:value",
    "title": "dc:title",
    "name": "schema:name",
    "role":"schema:role",
    "proportion":"schema:proportion",
    "lithology":"schema:lithology",
    "vocabulary":"schema:vocabulary",
    "lang": "schema:lang"
  },
  "type": "FeatureCollection",
  "features": [
    {
      "@id": "mf4",
      "@type": [
        "Feature",
        "gsml:MappedFeature",
        "http://vocabulary.odm2.org/samplingfeaturetype/mappedFeature"
      ],
      "name": "MURRADUC BASALT",
      "gsml:positionalAccuracy": {
        "@type": "CGI_NumericValue",
        "value": "120.0"
      },
      "gsml:GeologicUnit": {
        "@type":"gsml:GeologicUnit",
        "@id": "gu.25682",
        "description": "Olivine basalt",
        "geologicUnitType": "urn:ogc:def:nil:OGC::unknown",
        "gsml:composition": [
          {
            "@type":"gsml:composition",
            "gsml:compositionPart": [
              {
                "role": {
                  "value": "interbedded component"
                },
                "proportion": {
                  "dataType": "CGI_ValueProperty",
                  "CGI_TermValue": {
                    "dataType": "CGI_TermValue",
                    "value": {
                      "value": "significant"
                    }
                  }
                },
                "lithology": [
                  {
                    "@id": "cc.1",
                    "name": {
                      "value": [
                        "name_a",
                        "name_b",
                        "name_c"
                      ],
                      "lang": "en"
                    },
                    "vocabulary": {
                      "nilReason": "urn:ogc:def:nil:OGC::missing"
                    }
                  },
                  {
                    "@id": "cc.2",
                    "name": {
                      "value": "name_2",
                      "lang": "en"
                    },
                    "vocabulary": {
                      "nilReason": "urn:ogc:def:nil:OGC::missing"
                    }
                  }
                ]
              }
            ]
          }
        ]
      },
      "geometry": {
        "@type": "Polygon",
        "wkt": "POLYGON ((-1.3 52.5, -1.3 52.6, -1.2 52.6, -1.2 52.5, -1.3 52.5))"
      }
    }
  ]
}